Vectores y escalares

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17 Terms

1
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What is a vector quantity?

A vector quantity is one that has both magnitude (size) and spatial direction.

2
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What is a scalar quantity?

A scalar quantity is one that has only magnitude (size) without any direction.

3
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Give an example of a vector quantity.

Examples of vector quantities include force, velocity, displacement, weight, and acceleration.

4
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Give an example of a scalar quantity.

Examples of scalar quantities include speed, distance, time, and mass.

5
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How does speed differ from velocity?

Speed is a scalar that indicates how fast an object is moving, while velocity is a vector that includes both speed and direction.

6
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What does a positive sign in velocity indicate?

A positive sign in velocity indicates movement in the positive x direction.

7
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What does a negative sign in velocity indicate?

A negative sign in velocity indicates movement in the negative x direction.

8
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How do you represent a vector graphically?

A vector can be represented as an arrow where the length indicates magnitude and the direction indicates the orientation.

9
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What is the procedure for adding two vectors?

To add two vectors, place the tail of the second vector at the head of the first vector and draw a new vector from the tail of the first vector to the head of the second.

10
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What does the term 'resultant' refer to in vector addition?

The resultant is another term for the sum of two vectors.

11
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Explain how to subtract vectors.

To subtract vector B from vector A (A - B), you can add the opposite of vector B (A + -B).

12
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What happens when you multiply a vector by a scalar?

Multiplying a vector by a scalar changes its magnitude but not its direction.

13
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How do you decompose a vector into its components?

A vector can be decomposed into its horizontal (x) and vertical (y) components by using angles and trigonometry.

14
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What are the formulas for the horizontal and vertical components of a vector?

The horizontal component (AH) is A cos(θ) and the vertical component (AV) is A sin(θ).

15
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What is the use of the Greek letter theta (θ) in physics?

Theta (θ) is used to represent an angle in trigonometry and vector decomposition.

16
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How do you calculate sin and cos for an angle?

Use a calculator set to degrees to compute sin(θ) = opposite/hypotenuse and cos(θ) = adjacent/hypotenuse.

17
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What is the significance of breaking down a vector into components?

Breaking down a vector into components allows for the analysis of its effects in different directions.